3 dnl Copyright (C) 2002 Enrico Scholz <enrico.scholz@informatik.tu-chemnitz.de>
5 dnl This program is free software; you can redistribute it and/or modify
6 dnl it under the terms of the GNU General Public License as published by
7 dnl the Free Software Foundation; version 2 of the License.
9 dnl This program is distributed in the hope that it will be useful,
10 dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
11 dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 dnl GNU General Public License for more details.
14 dnl You should have received a copy of the GNU General Public License
15 dnl along with this program; if not, write to the Free Software
16 dnl Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 AC_DEFUN([_ENSC_DIETLIBC_C99],
20 AH_TEMPLATE([ENSC_DIETLIBC_C99], [Define to 1 if dietlibc supports C99])
22 AC_CACHE_CHECK([whether dietlibc supports C99], [ensc_cv_c_dietlibc_c99],
24 _ensc_dietlibc_c99_old_CFLAGS=$CFLAGS
25 _ensc_dietlibc_c99_old_CC=$CC
28 CC="${DIET:-diet} $CC"
31 AC_COMPILE_IFELSE([/* */],[
34 #include <sys/cdefs.h>
36 # error 'inline' badly defined
40 [ensc_cv_c_dietlibc_c99=yes],
41 [ensc_cv_c_dietlibc_c99=no])],
42 [ensc_cv_c_dietlibc_c99='skipped (compiler does not support C99)'])
45 CC=$_ensc_dietlibc_c99_old_CC
46 CFLAGS=$_ensc_dietlibc_c99_old_CFLAGS
49 if test x"$ensc_cv_c_dietlibc_c99" = xyes; then
50 AC_DEFINE(ENSC_DIETLIBC_C99,1)
54 dnl Usage: ENSC_ENABLE_DIETLIBC(<conditional>[,<min-version>])
55 dnl <conditional> ... automake-conditional which will be set when
56 dnl dietlibc shall be enabled
58 dnl * $ENSC_VERSION_DIETLIBC_NUM and
59 dnl * $ENSC_VERSION_DIETLIBC
61 AC_DEFUN([ENSC_ENABLE_DIETLIBC],
63 AC_MSG_CHECKING([whether to enable dietlibc])
65 AC_ARG_VAR(DIET, [The 'diet' wrapper (default: diet)])
66 AC_ARG_VAR(DIETFLAGS, [Flags passed to the 'diet' wrapper (default: -O)])
71 AC_ARG_ENABLE([dietlibc],
72 [AS_HELP_STRING([--disable-dietlibc],
73 [do not use dietlibc resp. enforce its usage
74 (with --enable-dietlibc) (default: autodetect dietlibc)])],
76 (yes) use_dietlibc=forced;;
77 (no) use_dietlibc=forced_no;;
78 (*) AC_MSG_ERROR(['$enableval' is not a valid value for --enable-dietlibc]);;
80 [which "$DIET" >/dev/null 2>/dev/null && use_dietlibc=detected || use_dietlibc=detected_no])
82 if test "$use_dietlibc" = detected -a "$2"; then
83 _dietlibc_ver=$($DIET -v 2>&1 | sed '1p;d')
84 _dietlibc_ver=${_dietlibc_ver##*diet version }
85 _dietlibc_ver=${_dietlibc_ver##*dietlibc-}
86 _dietlibc_ver_maj=${_dietlibc_ver%%.*}
87 _dietlibc_ver_min=${_dietlibc_ver##*.}
88 _dietlibc_ver_min=${_dietlibc_ver_min%%[[!0-9]]*}
90 _dietlibc_cmp_maj=${_dietlibc_cmp%%.*}
91 _dietlibc_cmp_min=${_dietlibc_cmp##*.}
93 ENSC_VERSION_DIETLIBC=$_dietlibc_ver_maj.$_dietlibc_ver_min
95 let _dietlibc_ver=_dietlibc_ver_maj*1000+_dietlibc_ver_min 2>/dev/null || _dietlibc_ver=0
96 let _dietlibc_cmp=_dietlibc_cmp_maj*1000+_dietlibc_cmp_min
98 test $_dietlibc_ver -ge $_dietlibc_cmp || use_dietlibc=detected_old
100 ENSC_VERSION_DIETLIBC=
104 ENSC_VERSION_DIETLIBC_NUM=$_dietlibc_ver
105 ensc_have_dietlibc=no
107 case x"$use_dietlibc" in
109 AM_CONDITIONAL($1, true)
110 AC_MSG_RESULT([yes (autodetected, $ENSC_VERSION_DIETLIBC)])
111 ensc_have_dietlibc=yes
114 AM_CONDITIONAL($1, true)
115 AC_MSG_RESULT([yes (forced)])
116 ensc_have_dietlibc=yes
119 AM_CONDITIONAL($1, false)
120 AC_MSG_RESULT([no (detected)])
123 AM_CONDITIONAL($1, false)
124 AC_MSG_RESULT([no (too old; $2+ required, $ENSC_VERSION_DIETLIBC found)])
127 AM_CONDITIONAL($1, false)
128 AC_MSG_RESULT([no (forced)])
131 AC_MSG_ERROR([internal error, use_dietlibc was "$use_dietlibc"])
135 if test x"$ensc_have_dietlibc" != xno; then
141 dnl Usage: ENSC_DIETLIBC_SANITYCHECK
142 AC_DEFUN([ENSC_DIETLIBC_SANITYCHECK],
144 AC_REQUIRE([AC_CANONICAL_HOST])
145 AC_REQUIRE([ENSC_ENABLE_DIETLIBC])
147 if test "$host_cpu" = x86_64 -a $ENSC_VERSION_DIETLIBC_NUM -le 0027; then
148 AC_MSG_WARN([*** ***])
149 AC_MSG_WARN([*** dietlibc<=0.27 is known to be broken for x86_64 systems ***])
150 AC_MSG_WARN([*** please make sure that at least the environ.S fix is applied ***])
151 AC_MSG_WARN([*** and lib/__nice.c added ***])
152 AC_MSG_WARN([*** ***])